Longitude position finder



July 2 1935.

E. KLOHT LONGITUDE POSITION FINDER Filed July 14, 19:3

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ATTORNEY Patented July 2, 1935 I I UNITED STATES PATENT OFFICE I2,006,809 LONGITUDE rosrrIoN, FINDER Ernest Kloht, New York, N. Y.

Application July 14, 1933, Serial No. 680,363

3 Claims. (01. s3-1) The main object of this invention is to pro-Vernier 26 is mounted on the inner edge 23 of vide a device foraccurately determining the the sector I and is deformed to lie flat uponthe longitude location of a ship, of which the device graduated face 2'!of the are 20. is part of the equipment, when given the latitude. Analtitude are 28 cooperates with the remain- 5 Another object of theinvention is to provide a ing members and has graduations 29 from zero 5device for locating and charting the longitude of 30 to 90 degrees nearthe lower end and from zero a ship when the latitude and sun declinationare to 20 degrees at the upper end. The lower curved given. end of thisaltitude arc is pivotally secured to a. The above and other objects willbecome ap- Vernier carriage 3! by a pin 32. The carriage 3| parent inthe description below, in which charis provided with a vernier blade 33upon which 10 acters of reference refer to like-named parts ingraduations 34 are inscribed. A locking carriage the drawing. 35 iscoupled to the Vernier carriage 3| by a Referring briefly to thedrawing, Figure 1 is a threaded adjusting screw 36 which latter enfrontelevational view of the finder. gages both the Vernier and lockingcarriage.

Figure 2 is a side elevational View of Figure 1. The adjusting screw hasa knurled enlargement 15 Figure 3 is a top plan view of Figure l. 31thereon which is engaged by the fingers when Figure 4 is a crosssectional view through one adjustment is to be made. of the sectorsshowing the means for locking the The: sector I5 has a vernier carriage38 thereon Vernier carriage in place. which is adjustably coupled to alocking carriage Figure 5 is a bottom plan view'of two cooper- 39 by anadjusting screw 4%. Said Vernier car- 20 ating sectors showing theirrelation. riage 38 is coupled pivotally to a second vernier Referring indetail to the drawing, the numercarriage 4| which latter rides on theinner edge al I!) indicates a flat semi-circular half ring over of thealtitude are 28 and said Vernier carriage approximately one half Whoseface arcuate gradis equipped with a locking carriage 42 and aduationsfrom 0 degrees to 80 are graduated and justing screw 43. The carriage 38and 4| are 25 are indicated by the numeral II. The zero gradpivotallycoupled by a hinge pin 44. uation I2 is located centrally on the ring.The On the reverse sides of the altitude are 28, ends of the half ringit) are squarely recessed at r to and Sector emu-ate Channels 45 a e l3as shown in Figure 3. On one side of the cutformed. All of the Vernierand locking carriages out portions I3 the face of the ring ends in are pv d w h k ys 6 w h ar i t gral 30 has tapering surfaces I4 which permitthe fold With their related parts a register in the chaning over to a 15degree angle of a cooperating neiS All Of the locking a es 35, 39 andsemi-circular sector l5. The open ends of the 45 have threaded apertures47 in which the sector l5 are recessed at l6 so as to match the threadedShanks 43 0f knurled locking s rews 49 ends of the ring It. The ends ofthe sector 15 are insertedand ring ID are mutually pivoted to each otherT device iS p tO determine the 10ngiby pins n in such fashion as topermit the sectud n wh c a p is located at the e i tor [5 to swing to aposition super-imposed over readingeXemplei y Setting the eamage thering it. This sector is graduated over its en- 33 at 42 d s 26 m u a d sttin th 0 tire face, the graduations l8 increasing on both ve n e at 3degrees 44 minutes on t e dsides of the zero graduation I!) which occursuations 011 member and Setting the V n e 38 at the centre of the5991301; at 17 degrees 53 minutes south, the reading on Aligned with thezero graduation l2 one end of the e 29 Will be 49 degrees 34 utes, Wh can are 20 is removably fixed to the inner marwill Intimate the longitudeof h p- Th ginal edge 2| of the ring In and rises arcuately adu on a 20register longitude. altl- 45 from the latter. The opposite end of theare 20 d are registers t altitude of e m is adapted t Sljdably passthrough rectangmar rlng l0 registers the latitude and sector l5 indiopenchannel 22 formed in the inner marginal Oates; the decline/01011- edge23 of the sector l5. Adjacent one side of It 15 to he noted that eeltalnan n o m the channel a tapering pocket 25 is formed. The andeonstnictieh y be made W t departing 50 intersection of the pocket andchannel is at the from the Spirit D O the V t center of thickness of thesector and the reading I claim: d

of the graduations is made from this position. 1. A semi-circular flatband, a. semi-circular The graduations occur on one face of the are 20declination sector, said band and sector being and are indicated by thenumeral 24. A curved graduated and mutually -fie band 55 ing its hingedends tapered for swinging declinarising above said sector, apivotally'joined pair ofverniers engaging said altitude arc and sector, a Verniercarriage riding on'said band having said altitude arc pivotally securedthereto and means for guiding and locking said verniers on saidcooperating members. V

V 2.'A-semi-circular fiat band, a semi-circular declination sector, saidband and sector being graduated and mutually hinged, said band taperingat the outer corners to-adaptthe declination sector to swing to an angleof fifteen degrees with respect to said band, a graduated altitudearcmovably joined to said band and rising above said sector, a pivotallyjoined pair of verniers engaging said' altitude arc and sector,;aVernier carriage riding on said band having said altitude arc pivotallysecured thereto and a curved channel on said ,band, sector and altitudeare for guiding said verniers around said cooperating members, and meansfor locking said verniers in any desired position. i V

3. A' semi-circular flat band, a. semi-circular declination sector, saidband and sector being graduated and. mutually hinged, a graduatedaltitude arc movably joined to said band and rising above said sector, apivotally joined pair oi verniers engaging said altitude arc and sector,a vemier carriage riding on said band having said altitude arc pivotallysecured thereto and a curved channel on said band, sector andaltitudeare for guiding said verniers around said cooperating members, lockingcarriages engaging said sector band and altitude arc and partlyregistering in said channels, locking screws for securing saidcarriages, and Vernier adjusting screws engaging said verniers andcarriages to adjust the former.

ERNEST KLOHT. 20

